package top.ffhome.framework.aspectj;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
import top.ffhome.common.annotation.DataScope;
import top.ffhome.common.constant.UserConstants;
import top.ffhome.common.core.domain.entity.SysRole;
import top.ffhome.common.core.domain.entity.SysUser;
import top.ffhome.common.core.domain.model.LoginUser;
import top.ffhome.common.core.domain.scope.Field;
import top.ffhome.common.core.domain.scope.LocalDataScope;
import top.ffhome.common.core.text.Convert;
import top.ffhome.common.utils.SecurityUtils;
import top.ffhome.common.utils.StringUtils;
import top.ffhome.framework.security.context.PermissionContextHolder;

import java.util.ArrayList;
import java.util.List;

/**
 * 数据过滤处理
 *
 * @author ruoyi
 */
@Aspect
@Component
public class DataScopeAspect {
    /**
     * 全部数据权限
     */
    public static final String DATA_SCOPE_ALL = "1";

    /**
     * 自定数据权限
     */
    public static final String DATA_SCOPE_CUSTOM = "2";

    /**
     * 部门数据权限
     */
    public static final String DATA_SCOPE_DEPT = "3";

    /**
     * 部门及以下数据权限
     */
    public static final String DATA_SCOPE_DEPT_AND_CHILD = "4";

    /**
     * 仅本人数据权限
     */
    public static final String DATA_SCOPE_SELF = "5";

    @Before("@annotation(controllerDataScope)")
    public void doBefore(JoinPoint point, DataScope controllerDataScope) throws Throwable {
        handleDataScope(point, controllerDataScope);
    }

    @After("@annotation(controllerDataScope)")
    public void doAfter(JoinPoint point, DataScope controllerDataScope) throws Throwable {
        LocalDataScope.remove();
    }

    protected void handleDataScope(final JoinPoint joinPoint, DataScope controllerDataScope) {
        // 获取当前的用户
        LoginUser loginUser = SecurityUtils.getLoginUser();
        if (StringUtils.isNotNull(loginUser)) {
            SysUser currentUser = loginUser.getUser();
            // 如果是超级管理员，则不过滤数据
            if (StringUtils.isNotNull(currentUser) && !currentUser.isAdmin()) {
                String permission = StringUtils.defaultIfEmpty(controllerDataScope.permission(), PermissionContextHolder.getContext());
                dataScopeFilter(joinPoint, currentUser, controllerDataScope.deptAlias(), controllerDataScope.userAlias(), permission);
            }
        }
    }

    /**
     * 数据范围过滤
     *
     * @param joinPoint  切点
     * @param user       用户
     * @param deptAlias  部门别名
     * @param userAlias  用户别名
     * @param permission 权限字符
     */
    public static void dataScopeFilter(JoinPoint joinPoint, SysUser user, String deptAlias, String userAlias, String permission) {
        List<Field> params = new ArrayList<>();
        List<String> conditions = new ArrayList<>();
        List<String> scopeCustomIds = new ArrayList<>();
        user.getRoles().forEach(role -> {
            if (DATA_SCOPE_CUSTOM.equals(role.getDataScope()) && StringUtils.equals(role.getStatus(), UserConstants.ROLE_NORMAL) && StringUtils.containsAny(role.getPermissions(), Convert.toStrArray(permission))) {
                scopeCustomIds.add(Convert.toStr(role.getRoleId()));
            }
        });

        for (SysRole role : user.getRoles()) {
            String dataScope = role.getDataScope();
            if (conditions.contains(dataScope) || StringUtils.equals(role.getStatus(), UserConstants.ROLE_DISABLE)) {
                continue;
            }
            if (!StringUtils.containsAny(role.getPermissions(), Convert.toStrArray(permission))) {
                continue;
            }
            if (DATA_SCOPE_ALL.equals(dataScope)) {
                params = new ArrayList<>();
                conditions.add(dataScope);
                break;
            } else if (DATA_SCOPE_CUSTOM.equals(dataScope)) {
                if (scopeCustomIds.size() > 1) {
                    // 多个自定数据权限使用in查询，避免多次拼接。
                    params.add(new Field("in", deptAlias, StringUtils.format("SELECT dept_id FROM sys_role_dept WHERE role_id in ({})", String.join(",", scopeCustomIds))));
                } else {
                    params.add(new Field("in", deptAlias, StringUtils.format("SELECT dept_id FROM sys_role_dept WHERE role_id={}", role.getRoleId())));
                }
            } else if (DATA_SCOPE_DEPT.equals(dataScope)) {
                params.add(new Field("eq", deptAlias, user.getDeptId().toString()));
            } else if (DATA_SCOPE_DEPT_AND_CHILD.equals(dataScope)) {
                params.add(new Field("in", deptAlias, StringUtils.format("SELECT dept_id FROM sys_dept WHERE dept_id={} or find_in_set({},ancestors)", user.getDeptId(), user.getDeptId())));
            } else if (DATA_SCOPE_SELF.equals(dataScope)) {
                if (StringUtils.isNotBlank(userAlias)) {
                    params.add(new Field("eq", userAlias, user.getUserId().toString()));
                } else {
                    // 数据权限为仅本人且没有userAlias别名不查询任何数据
                    params.add(new Field("eq", deptAlias, "0"));
                }
            }
            conditions.add(dataScope);
        }

        // 角色都不包含传递过来的权限字符，这个时候sqlString也会为空，所以要限制一下,不查询任何数据
        if (StringUtils.isEmpty(conditions)) {
            params.add(new Field("eq", deptAlias, "0"));
        }

        if (params.size() > 0) {
            LocalDataScope.set(params);
        }
    }
}
